copper sulfate
noun
: a sulfate of copper
especially
: the normal sulfate that is white in the anhydrous form but blue in the crystalline hydrous form CuSO4·5H2O and that is often used as an algicide and fungicide
Examples of copper sulfate in a Sentence
Recent Examples on the Web
Look for copper hydroxide, copper sulfate, or copper oxychloride sulfate in the active ingredients label.
—
Mary Marlowe Leverette, Southern Living, 12 July 2025
The group worked their way through borax, boric acid, salicylic acid, benzoic acid, sulfur dioxide, formaldehyde, copper sulfate, and saltpeter– among other things.
—Lauren Leffer, Popular Science, 1 May 2025
Avène’s proprietary mineral water has been studied extensively and is proven to have anti-inflammatory and redness-relieving properties; the formula also features fellow skin soothers zinc oxide, zinc sulfate, and copper sulfate to help heal skin.
—Emily Orofino, Allure, 24 Oct. 2024
Starting in the late 1800s people discovered that chemicals, such as copper sulfate, could prevent a pest from causing crop damage.
—Steven Savage, Forbes, 22 Oct. 2024
The Environmental Protection Agency also authorized adding additional copper sulfate and sodium permanganate to the aqueduct's reservoirs to combat the algae, the Army Corps of Engineers said.
—Faris Tanyos, CBS News, 3 July 2024
Organic farmers had to regularly and preemptively spray with copper sulfate, though biodynamic Château Fonplégade reports good results with an oak bark solution.
—Elin McCoy, Fortune Europe, 11 May 2024
Silverwood Lake was treated with copper sulfate on Tuesday in an effort to control the algal bloom, agency officials said.
—Hayley Smith, Los Angeles Times, 9 May 2024
Yan starts with diamondoids in a solvent like toluene, and another vessel containing copper sulfate dissolved in a solvent like water or ethylene glycol.
—IEEE Spectrum, 31 Mar. 2017
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Mary Marlowe Leverette, Southern Living, 12 July 2025
The group worked their way through borax, boric acid, salicylic acid, benzoic acid, sulfur dioxide, formaldehyde, copper sulfate, and saltpeter– among other things.
—Lauren Leffer, Popular Science, 1 May 2025
Avène’s proprietary mineral water has been studied extensively and is proven to have anti-inflammatory and redness-relieving properties; the formula also features fellow skin soothers zinc oxide, zinc sulfate, and copper sulfate to help heal skin.
—Emily Orofino, Allure, 24 Oct. 2024
Starting in the late 1800s people discovered that chemicals, such as copper sulfate, could prevent a pest from causing crop damage.
—Steven Savage, Forbes, 22 Oct. 2024
The Environmental Protection Agency also authorized adding additional copper sulfate and sodium permanganate to the aqueduct's reservoirs to combat the algae, the Army Corps of Engineers said.
—Faris Tanyos, CBS News, 3 July 2024
Organic farmers had to regularly and preemptively spray with copper sulfate, though biodynamic Château Fonplégade reports good results with an oak bark solution.
—Elin McCoy, Fortune Europe, 11 May 2024
Silverwood Lake was treated with copper sulfate on Tuesday in an effort to control the algal bloom, agency officials said.
—Hayley Smith, Los Angeles Times, 9 May 2024
Yan starts with diamondoids in a solvent like toluene, and another vessel containing copper sulfate dissolved in a solvent like water or ethylene glycol.
—IEEE Spectrum, 31 Mar. 2017
Cite this Entry
“Copper sulfate.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/copper%20sulfate. Accessed 10 Sep. 2025.
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